000 AXPZ20 KNHC 100303 TWDEP Tropical Weather Discussion NWS National Hurricane Center Miami FL 303 UTC Sun Jun 10 2018 Tropical Weather Discussion for the eastern Pacific Ocean from the Equator to 32N, east of 140W. The following information is based on satellite imagery, weather observations, radar, and meteorological analysis. Based on 0000 UTC surface analysis and satellite imagery through 0200 UTC. ...SPECIAL FEATURES... Tropical Storm Aletta centered near 15.9N 114.3W at 10/0300 UTC or 490 nm SSW of The Southern Tip Of Baja California moving W at 6 kt. Estimated minimum central pressure is 999 mb. Maximum sustained wind speed is 50 kt with gusts to 60 kt. Deep convection has dissipated near the system center. However, numerous squalls are within 120 nm of the center. Aletta continues to weaken rapidly with the combination of strong vertical shear, cooler sea surface temperatures, and dry air entrainment. The latest forecast has Aletta weakening to a tropical depression Sunday evening. Please refer to the latest NHC Forecast Advisory under WMO/AWIPS headers WTPZ22/MIATCMEP2, and the NE Pacific High Seas Forecast under WMO/AWIPS headers FZPN03/MIAHSFEP2 for the latest information on this system. Recently upgraded Tropical Storm Bud centered near 12.9N 102.0W at 10/0300 UTC or 500 nm SSE of Cabo Corrientes Mexico moving NW at 9 kt. Estimated minimum central pressure is 1003 mb. Maximum sustained wind speed is 35 kt with gusts to 45 kt. Numerous moderate scattered strong convection were noted within 120 nm S semicircle. Scattered moderate isolated strong convection are elsewhere from 09N to 16N between 99W and 111W. Bud will continue to intensify as it moves on a northwestward track. The system is forecast to reach hurricane intensity Monday morning. Please refer to the latest NHC Forecast Advisory under WMO/AWIPS headers WTPZ23/MIATCMEP3, and the NE Pacific High Seas Forecast under WMO/AWIPS headers FZPN03/MIAHSFEP2 for the latest information on this system. ...INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH... The monsoon trough extends from 09N83W to 10N95W. It resumes from 10N118W to 08N130W. The ITCZ extends from 08N130W to 06N140W. Scattered moderate isolated strong convection was noted from 05N to 10N east of 93W. Scattered moderate isolated strong convection was noted from 10N to 14N between 90W and 95W. Scattered moderate convection was noted within 360 nm south of the monsoon trough between 114W and 130W. ...DISCUSSION... OFFSHORE WATERS WITHIN 250 NM OF MEXICO... See above for more on Tropical Storm Aletta and Tropical Storm Bud. Elsewhere, a broad ridge W of the area will support moderate to fresh NW winds west of the Baja Peninsula through the remainder of the weekend. A pulse of NW swell prevails west of northern Baja California, with seas greater than 8 ft. This swell will merge with swell generated by Tropical Storm Aletta west of the Baja Peninsula generating confused seas greater than 8 ft that will persist into early next week, becoming reinforced next week by Tropical Storm Bud. OFFSHORE WATERS WITHIN 250 NM OF CENTRAL AMERICA, COLOMBIA, AND WITHIN 750 NM OF ECUADOR... Fresh east winds will continue across and downstream of the Gulf of Papagayo through the period, becoming fresh to strong Sat night. The monsoon trough will meander across the forecast waters near 10N. REMAINDER OF THE AREA... The surface ridge extending across the northern waters will slowly shift westward the next few days. Fresh trades will continue across the tropics to the south of the ridge supporting 8 to 9 ft combined wind waves and SW swell from around 15N to 25N W of 130W. NW to N swell from strong northerly winds along the coast of California continues to support seas to 9 ft over the waters N of Aletta, and E of 130W. This swell will combine with swell generated from Tropical Storm Aletta the remainder of this weekend. Long period cross- equatorial SW swell is also propagating across the forecast waters. New swell is being generated by recently upgraded Tropical Storm Bud. The swells from these systems will combine the next couple of days, with seas greater than 8 ft covering much of the forecast waters south of 25N and west of 95W through Sunday in mixed swell. Early this coming week, the SW swell will diminish which will help to decrease the area of seas greater than 8 ft over the region. $$ Latto